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configure.ac's AC_SEARCH_LIBS([backtrace], [execinfo], ...) fails with 'libexecinfo not found' on musl, which lacks glibc's backtrace()/backtrace_symbols(); depend on the libexecinfo compat library there. Once configure succeeds, ticks.h's timeval2nsec() needs struct timeval, which was only pulled in via <sys/time.h> under __FreeBSD__, and vma-xlio-redirect.cpp calls sscanf()/sprintf() without including <cstdio>; fix both for musl too. AI-Generated: Uses Claude Code Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>